On Tue, Dec 08, 2015 at 04:03:59PM +0100, W. Martin Borgert wrote: > >There is also a hint for iceowl-extension on not remebered passwords, > >maybe this is issue? > > > >https://wiki.debian.org/Icedove#Iceowl-extension_does_not_remember_credentials > > This is problably the cause of the message, that I related > wrongly to the SMTP sending failure. > > I wonder what your SMTP config is? Mine is: > > Server: mydomain.com > Port: 587 > Username: username > Auth method: NTLM > Security: STARTTLS
We use slightly the same configuration except small differences, but we got also a load balancer between me and the exchange backend. Security: STARTTLS Authentication: password, normal Port: 25 (instead of 587) But I assume that the NTLM authentication is the origin of your trouble. If possible try out SSL/TLS instead of NTLM. I can remember that at least for old samaba servers (that can't handle NTLM v2) I had to allow NTLM v1 on the local lan. But that's something you really don't want to do in company areas. This old article I found on the microsoft site. https://support.microsoft.com/en-us/kb/976918 Regards Carsten
